Sealing gasket



FIG. 1 is a top plan view showing my new sealing gasket design, the bottom plan view being a mirror image thereof;

FIG. 2 is a side view thereof; and,

FIG. 3 is a sectional view thereof taken along the line 3-3 of FIG. 1. 

The ornamental design for a sealing gasket, as shown and described. 